Hi Catie,
The only programs I know that will destroy that virus are ones you must install on the computer.
The free version of Malwarebytes' Anti-Malware should kill that malware/virus.
http://www.malwarebytes.org/products/malwarebytes_freeInstall it, make sure it is UPDATED, then Run a FULL scan (the "Quick" scan will probably not work well).
Then follow whatever instructions it gives you.
After, install and run the free version of "CCleaner". Run the "Cleaner" and "Registry" options.
http://www.filehippo.com/download_ccleanerLAST, to hide that you install any programs no the PC what you can do is Delete the Shortcuts they leave behind to open them up. Unless your parents are computer techs I doubt they will know they are there.